How To Do the Plumbing Under a Kitchen Sink – YouTube Guide

Struggling with a leaky faucet, slow drain, or planning a full kitchen remodel? You’re not alone—over 60% of U.S. homeowners attempt at least one plumbing DIY project per year, according to HomeAdvisor. If you’ve searched “how to do the plumbing under a kitchen sink YouTube,” you’re looking for clear, visual, and reliable guidance—and you’ve come to the right place. In this guide, we’ll walk you through everything you need to know, from tools to trap types, plus highlight the best YouTube resources that actually follow plumbing codes and safety standards.

Why Watch a YouTube Tutorial for Kitchen Sink Plumbing?

Many beginners assume plumbing is too complex—but with the right visual aid, even first-timers can succeed. YouTube offers real-time demonstrations, close-up shots of fittings, and troubleshooting tips you won’t find in static manuals. However, not all videos are created equal. Look for creators certified by organizations like the International Association of Certified Home Inspectors (InterNACHI) or those who reference the Uniform Plumbing Code (UPC).

💡 Pro Tip: Always verify if your local jurisdiction follows UPC or the International Plumbing Code (IPC)—they differ slightly in trap arm length and venting rules.

What Tools & Materials Do You Need?

Before hitting play on any “how to do the plumbing under a kitchen sink YouTube” video, gather these essentials:

• Adjustable wrench or channel-lock pliers
• Pipe cutter or hacksaw
• Teflon tape (for threaded connections)
• Plumber’s putty or silicone sealant (for basket strainers)
• Bucket & towels (for water spills)
• PVC or ABS pipes/fittings (typically 1.5″ diameter for sinks)
• P-trap kit (includes tailpiece, trap bend, and trap arm)

⚠️ Never use PVC cement on slip-joint connections—these are designed to be hand-tightened and adjustable.

Step-by-Step: Installing Kitchen Sink Drain Plumbing

Follow these steps while watching a high-quality YouTube tutorial (we’ll recommend top picks shortly):

1. Turn Off Water Supply & Disconnect Old Pipes

• Shut off hot and cold valves under the sink.
• Place a bucket beneath to catch residual water.
• Loosen compression nuts and remove old P-trap.

2. Install the Basket Strainer

• Apply plumber’s putty under the flange.
• Insert from the top, then secure with the locknut underneath.
• Tighten evenly to avoid cracking the sink.

3. Attach the Tailpiece

• Slide the tailpiece into the strainer outlet.
• Use a washer and slip nut—hand-tighten, then give a quarter-turn with pliers.

4. Connect the P-Trap

• Measure the distance from the tailpiece to the wall drainpipe.
• Cut the trap arm to fit (leave ~2″ insertion depth).
• Assemble the P-trap: tailpiece → trap bend → trap arm → wall stub-out.

✅ Critical Detail: The trap must be no more than 24 inches below the sink overflow (per UPC Section 1002.1). This prevents siphoning and sewer gas entry.

5. Test for Leaks

• Turn water back on.
• Run both hot and cold for 2–3 minutes.
• Check all joints with a dry paper towel—any moisture = re-tighten.

For a visual walkthrough, see this highly rated plumbing tutorial (note: always verify creator credentials).

Best YouTube Channels for Kitchen Sink Plumbing

Not all plumbing videos are trustworthy. Here are three vetted channels that prioritize safety, code compliance, and clarity:

Avoid videos that skip venting explanations or use makeshift fixes (e.g., bottle traps)—these violate building codes and risk health hazards.

📚 Learn more about drainage systems on Wikipedia’s plumbing page, which outlines global standards and historical context.

Common Mistakes to Avoid (And How YouTube Helps)

Even experienced DIYers make these errors:

• Incorrect trap orientation: The P-trap must form a “P,” not an “S.” S-traps are banned in most U.S. codes because they can siphon water.
• Over-tightening slip joints: This cracks plastic fittings. Hand-tight + ¼ turn is enough.
• Ignoring venting: Every drain needs a vent within 5 feet (UPC) to prevent airlock and slow drainage.

YouTube excels here—watching someone demonstrate proper trap alignment is far more effective than reading about it.

P-Trap vs Bottle Trap: Which Should You Use?

Stick with the P-trap—it’s legal, reliable, and universally accepted by inspectors.

FAQ Section

Q1: Can I reuse old pipes when reinstalling a sink?

A: Only if they’re in perfect condition—no cracks, warping, or mineral buildup. Most professionals recommend replacing the entire P-trap kit ($12–$20) for peace of mind.

Q2: Why does my sink smell after plumbing work?

A: Likely causes: (1) trap dried out (run water weekly), (2) improper venting, or (3) sewer gas entering due to a loose cleanout plug. A properly installed P-trap should block odors.

Q3: Do I need a permit to replumb under my kitchen sink?

A: Generally, no—minor fixture replacements don’t require permits in most U.S. municipalities. But if you’re relocating the drain line or adding a dishwasher branch, check with your local building department.

Q4: How long does it take to plumb a kitchen sink?

A: For beginners: 1.5–2 hours with a good YouTube guide. Pros do it in under 30 minutes. Allow extra time for unexpected issues (e.g., corroded shut-off valves).

Q5: Can I connect a dishwasher to the same drain?

A: Yes—but you must install a high-loop or air gap to prevent backflow. Most YouTube tutorials show this step; never skip it for health safety.

Q6: What if my wall drain is too high or low?

A: Use flexible accordion tubing only as a last resort—it’s prone to clogs and often fails inspection. Better solutions: adjust cabinet height or use offset fittings.

Conclusion

Learning how to do the plumbing under a kitchen sink doesn’t have to be intimidating—especially when you pair hands-on work with trusted YouTube tutorials that emphasize safety, code compliance, and clarity. With the right tools, a bit of patience, and guidance from certified professionals, you can save hundreds on plumber fees and gain lasting home maintenance skills.

✅ You now know:

• The exact materials needed
• How to avoid costly mistakes
• Where to find reliable video instruction
• Why code compliance matters for health and resale value

If this guide helped you, share it on Pinterest, Facebook, or Reddit—your DIY-savvy friends will thank you! And before you start, subscribe to a reputable plumbing channel so you’re always learning from the best.

Remember: Great plumbing isn’t just about stopping leaks—it’s about building confidence, one pipe at a time. 🛠️💧